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*STTR Project: High Brightness Neutron Source for
Radiography—Adelphi Technology, Inc.,
Dr. Jay Theodore Cremer, Principal Investigator, ted@adelphitech.com
Dr. Charles K. Gary, Business Official, cgary@adelphitech.com
DOE Grant No. DE-FG02-04ER86177
Amount: $600,000
Research Institution
E. O. Lawrence
Neutron radiography, which uses nuclear reactors and accelerators as sources of neutrons, has been demonstrated to be an excellent method for imaging high-density, thick objects for the detection of corrosion, voids, and cracks, particular in nuclear power plants. Unfortunately, no high brightness neutron sources exist that are portable, inexpensive and capable of neutron radiography in short imaging times. This project will develop a robust, portable, high-brightness neutron generator, which is capable of imaging with reasonable exposure times. The device will produce either fast or thermal neutrons, permitting the imaging of cracks and voids in a wide range of material thicknesses. Phase I simulated the required neutron yield that was needed for a variety of practical imaging situations. Imaging experiments, using both fast and thermal neutrons from prototype sources, were performed. Based on the results, fast and thermal neutron generators were designed. Phase II will fabricate two compact, high-brightness neutron generators that will produce either fast or thermal neutrons. The generators will be rugged and safely operated in a power plant environment. Unlike previous RF Induction, neutron generators, these generators will have their high-voltage components safely enclosed in the interior of the devices, and previously peripheral devices (e.g., RF power matching network) will be integrated into the generator heads.
Commercial Applications and Other Benefits as described by the awardee: Neutron radiography would be the nondestructive evaluation technique of choice where the diameter and thickness of the piping are too large for x-ray radiography or where the presence of multiple layers of extruded insulation materials around metal piping or conduits renders other techniques (ultrasonic, eddy current, magnetic particle) ineffective. In particular, a compact fast neutron source, capable of penetrating steel, lead, or uranium, should greatly improve nondestructive evaluation in nuclear plants. The neutron radiography source also should be applicable to the nondestructive testing needs of commercial and military aircraft, public utilities, and petrochemical organizations.